When attempting to list the AD objects the following error occurs:
Logon failure: unknown user name or bad password

In the Trace.log file (C:\Program Files\ArchiveTools\CloudLink\Logs\
Failed to bind with RootDSE object of domain controller 'abc.com' Detail:
Logon failure: unknown user name or bad password.
The CL service account fails to authenticate to the domain controller preventing the AD information from being accessed properly.
Re-register the domain controller in CL:
Go to Configuration > Configuration Tasklist > Directory Synchronization Configuration > Register Domain Controller (on the left side of screen)
To test that it is working, create a new task and select Use a filter below to limit which user(s), group(s) and OU(s) will be synchronized to see if the AD objects can be listed properly.
If removing the DC from CL doesn't resolve the issue the CloudLink.sdf file is corrupt or has data that can't get updated properly without assistance from Veritas Support. Please create a case with Support to get further assistance and refer to this article.